Here's the amended (and hopefully final) version of the Active.
Novice: there are no aft fins abaft the stabilizer; however, I had reason to more thoroughly recheck the actual alignment of both the stabilizer and the position and shape of the forward fin. Also I did redo completely your suggestion for a new sonar dome, and also moved it further to the bows.
With regards to the RTN-10x I had to redraw it substantially. I did, indeed, find one that I could use on the radar sheet, yet it wasn't satisfactory enough, so this is my rendition. Other minor alterations and corrections should be obvious.
Regarding the hull, Hood, it's been shortened. I did recalculate it and found that it was, indeed, slightly too long. I also lowered the upper portion of the hull, and graced it with a new bow. Also the rudder has been modified. I did darken the casings around the vent louvres, but I'm not reshading them as you suggested. I'll keep the color as it is since we do have a certain artist's licence, and much of my work is based on official and private models of the ship, in addition to plans and photos. Ergo: I want to retain a slight "new, fresh" attitude of the ship. This is my choice and I believe I've motivated it well enough.
So, here's the redrawn HMS Active as of 1987:
Ok, Hood and Golly, I've made a few updates. To my great horror, I noticed that I've not thoroughly enough checked the radar mast, so there were a few fields filled which should not have been; thus taken care off. As for the flag I've got no issue with changing that. The size is proper enough. But, Golly, although you propably put your heart and soul into making that White Ensign, I wasn't satisfied with its "ummpff" It simply didn't cut my criterion for liveliness and flare, so I manipulated it additionally to make it "fly more in the wind". I hope you don't mind. And, of course, if that flag is approved and well-liked enough, I'm all for other users to just pickit up and use it! Anyway, the final of the final version's posted!